Flat or volume-y: Which looks better?

You guys know my ongoing saga with trying to give my hair volume. (A quick recap: My hair is bee-yond flat. I think I look much better with a little oomph, so I've amassed a substantial collection of volumizing sprays, rollers and curling irons in an attempt to gain said volume.) Anyway, for whatever reason, I decided to wear my hair straight the other day. Tram said she liked it, and she's someone whose opinion I trust. Now, here's my question to you guys: What style do you think looks better—flat or volume-y? (Be brutally honest!)